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Lodgy
P Plater
68 Posts
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 Posted - 12 Jun 2010 : 2:49:28 PM
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G'day, so i went and picked up the VN today, i was right about the ss interior and wheels, but wrong about the main topic, the fuel pump.
the fuel is being pumped past the fuel filter when priming, but hasn't been tried while turning it over, instead we have had the fuel line disconnected from the fuel rail and if anything only a little bit spits at you whilst turning it over.
A mate suggested to block off the reg by clamping the hose shut, this did not change anything..
if anybody has some information on what this problem might be i would be very greatful,
Thanks, Lodgy
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Mechknight73
National Driver
1001 Posts
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Posted - 12 Jun 2010 : 4:34:34 PM
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| Not that I know the reg assembly all that well, but have you tried disconnecting the fuel line before the reg? Also, there's some chance you might have a leak; this would explain the lack of pressure to the fuel rail. Try back-flushing the fuel system from the rail back, and see if it makes any difference. In other words, pump some fuel back towards the pump. There are some organisms that love hydrocarbons as food, and will happily grow like algae in settled fuel. It could just be a simple blockage. I'm assuming that it's pumping fairly well after the fuel filter on the line under the car. If not, there's another filter on the pickup in the tank, a mesh screen. Either of the two can mess with fuel pressure if choked up. |
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Lodgy
P Plater
68 Posts
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Posted - 12 Jun 2010 : 5:53:05 PM
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thanks for the suggestion, theres definately enough pressure from the fuel filter as my face found out when dad turned the ignition on and i wasnt ready :) but yeah ill try backflushing the system, how do you recommend this? should i just blow an air compressor down there or should i hook up an inline fuel pump ive got lying around to pump through from there?
thanks fro the help, hopefully ill get it gooing soon |
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Mechknight73
National Driver
1001 Posts
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Posted - 12 Jun 2010 : 10:44:15 PM
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I'd do an inline fuel pump, less chance of damaging anything. It will also prove circulation is ok.
One thing to remember, is that fuel injectors often need to be "bled;" Disconnecting the injectors one by one, and getting all the air out of each line. I would, if you have a manual, check what governs the fuel injectors themselves. I don't know them in intricate detail, but suspect there's some kind of solenoid involved, either at the reg or on individual injectors. Hopefully someone will step in and correct me if I'm wrong. |
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Lodgy
P Plater
68 Posts
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Posted - 13 Jun 2010 : 5:00:45 PM
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| yeah im not sure about the injectors either, is there a sort of cut off valve in the fuel line which could re route the fuel back to the tank? |
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Mechknight73
National Driver
1001 Posts
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Posted - 13 Jun 2010 : 5:33:44 PM
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On reading the manual, that barrel assembly with a vacuum line attached to it is the fuel pressure regulator. If I remember rightly it's about 30mm in diameter and the casing is a black metal thingy. If you can use another one you know that works, try it and/or buy a new one.
I can transcript what my service manual says word for word, but in essence, the fuel pressure regulator runs on vacuum. Check the vacuum line, replace it if necessary, and change the fuel pressure regulator. It's also suggested to check that the vacuum hose isn't clogged as well. If all that doesn't work, let me know and I'll dig deeper. |
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Lodgy
P Plater
68 Posts
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Posted - 13 Jun 2010 : 6:05:15 PM
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thanks mate, its a tad too dark outside now to give it a go, i just gave it a quick squirt down with the pressure washer and besides a small dent in the rear drivers side door, and a bit of faded paint on one guard, it is all in perfect condition.. i'm getting excited lol, hopefully the day off tomorrow will give us a bit more time to get it going.
Thanks |
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Lodgy
P Plater
68 Posts
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Posted - 14 Jun 2010 : 1:41:45 PM
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| finally got fuel to the rail :) but still wont run, have a look and its got no spark :/ one of my neighbours has a VN which he would happily lend me coilpacks or a computer to test but might i damage these using them in my car, and also his is a series 2 manual and mine is a series 1 auto if there is any difference |
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Mechknight73
National Driver
1001 Posts
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Posted - 14 Jun 2010 : 1:58:14 PM
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| There's a wiring and structural difference between S1 and S2 coilpacks, although look for the "stupid and obvious" things that might be wrong first. Are there any wires loose on the ignition? Are there any fuses shot? (There's a fuse in the engine bay box, and a relay under the dash)Another thing to watch for, does it have any kind of dodgy immobiliser hooked up to it? If it does, check to make sure that isn't messing with the ignition. This way, you can look at the coil pack and say for sure, "this thing is knackered!" |
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Lodgy
P Plater
68 Posts
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Posted - 14 Jun 2010 : 2:02:17 PM
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yeah first thing we noticed was a dodgy earth from the battery to the body, so hooked up a jumper lead from the negative terminal to one of the bolts on the strut top thingys. this did not help 1 bit.
there is also a thin wire, the size of ordinary speaker wire, coming from the battery positive with an inline fuse which then runs along with a wire from the negative all the way into the cab which seem to be connected to a red LED which has been placed around where your left knee would be next to the centre console whilst driving.
The fuse is not blown and the LED does SFA but i am not sure what it is for |
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SKDWGN
P Plater
80 Posts
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Posted - 14 Jun 2010 : 5:48:22 PM
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| check to see if the red wire that goes into your coil pack has power cos ive had a car thats had no spark and all it was a broken wire |
wheres theres smoke theres rubber |
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Lodgy
P Plater
68 Posts
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Posted - 14 Jun 2010 : 6:12:09 PM
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| yeah i checked for power to the coil packs and its getting 11.89 which is the same as at the battery, so my neighbour is gunna pick one up from his mate tomorow to test out |
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Mechknight73
National Driver
1001 Posts
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Posted - 14 Jun 2010 : 7:44:03 PM
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| You could always check the wiring section by section. Trace it all the way back to the ignition loom, and see what someone, or Mother Nature has messed with |
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dirk diggler
P Plater
32 Posts
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Posted - 19 May 2011 : 8:03:48 PM
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| hello guyz i dont know if its been asked yet but anway can injectors of a ecotec v6 fit onto a vn v6 series 2 |
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Topic |
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Fuel Injectors
